Coal-cutting chain



June 29 1926. I 1,590,821

F.-J. OAKEs COAL-CUTTING 0mm Filed Juhe 27, 1922 2 Sheets-Sheet 1 June 29 1926. 1,59%,821

J. CAKES COAL CUTTING CHAIN Filed June 7761922 2 Sheets-Sheet 2 Fill til

Patented. June 29, 1926.. V

out TED STAT FRK J. OAKES, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO LINK-BELT COMPANY,

OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

ooAn-cu'rre cnaru.

Application new June 27,1922. Serial Ito. name.

My invention relates to certain improvements in chains of the type used in cutting kopal, in which certain links carry the cutting its.

A. further object of theinvention is to provide the links carrying the cutting hits with extended hearings.

A still further object of the invention is to revent the chain buckling when the hits strike the coal.

In the accompanying drawings:

Fig. 1 is a side view of a section of my improved cuttin chain;

Fig. 2 is a si e view, partly in section, showing a method of holding the bits; 1F Fig. 3 is a sectional view on the line 3-3,

Fig. 4 is an inverted plan view showing the pockets for the teeth wheels; 1 hilig. 5 is a perspective view of a cutting Fig. 6 is a perspective view of it connect in%11nk;

ig. 7 is a detached perspective 'view of one of the pivot pins;

Fig. 8 is a view of a modification of the invention; and Fig. 9 is a longitudinal showing the chain hent.

1, l are the cutting links of the chain. 2 are the connecting links. The links are con nected by ivot pins 3, shaped as shown in Fig. 7. T .e pivot pins extend through openings 4 in the cutting link and throu h openings 5 in the connecting link, as clear y shown in Fig. 3. The pin is reduced at 6 and the end is riveted over a washer '2' located in a recess 8 in one side of the cutting link so that the pin is secured to the cutting link and the connecting link turns on the m. P In each opening 5 is a segmental hearing 9, shaped as shown in Figs. 2 and 6. This hearin is made of hard metal.

it will he noticed that the links 1 and 2 are interlocked at the pivot, as shown clearly inthe inverted plan view, Fig. 4t. Each cutting'link has an enlargement 10 at each end, and each connecting link has an enlargement 11 at each end. These enlar elnfents form shoulders 12 and 13 helow t e pivot, which are in contact when the chain is traveling in a straight line. The argemeets a term oulders 12aand it Sectional view of the sprocket which come in contact with each other when the chain is flexed in passing around a sprocket wheel, or other curved object.

At each side of each cutting link is a hearing flange 14. On the connecting links are bearing flan cs 15. The bearing flanges on the cutting links extend beyond the center ofthe pivots 3, providing a long bearing for the link so that it will resist any tendency to lift when the cutting hit is engaging the coal.

16 is a cutting hit, rectangular in cross section in the present instance, and chisel points at both ends. The hit is adapted to a socket 17 in a cutting link, and a wedge block 19 hears against the under side of the bit. A set screw 20 forces the wedge 19 against the hit, clampin it against the wall of the socket. The we ge has laterally extending lugs 21, which travel in the ways in the llnk, as clearly shown in Fig. 3.

22 are vertical channels connecting with the ways, which permit the removal of the wedge on hacking oil the screw. The construction of the means for holding the cut ting hits may he modified without departing from the essential features of the invention.

In Fig. 8, a modification is illustrated in which the cutting link l is recessed to receive an angular bit 16, which is heldhy a set screw 20.

From the ahove construction, it will he seen that a substantial chain is provided, in which each link is made in a single piece with a wide hearing at the lease. The pivot pins areso designed that theycan he secured to the cutting links, which enables the connecting links to turn upon them. The pivot pins can be easily removed, when worn, and the hashing can he quickly replaced, when necessary.

Tn each side of each cutting link is an inclined passage 23, which communicates with a pocket 24 in the under sideof the link into which a teeth of a sprocket wheel extends. The ohject of these passages is to prevent coal packing in the pockets, as any coal entering the pockets will he forced through the passages hy the action of the sprocket teeth.

I claim:

l. The comhination in acoal cutting chain, of a series of cutting links and a, series of connecting links alteruat with the cutting :a and pivotally l lhchfidhs tlll tilt

till") and cutting bits carried by the cutting links, the cutting links and the connecting links having extended side bearing flanges, the

flanges of the cutting links extending to, or beyond, the pivots of the said links.

2. The combination in a coal cutting chain, of a series of cutting links alternating with a series of connecting links; pivot pins connecting. the several links; and cutting bits carried by the cutting links, the two sets of links having segmental enlargements at the pivots forming shoulders, the lower shoulders abutting when the chain is straight, the other shoulders being arranged necting links; and pivot pins .for the several links, each cutting link having a bearing 20 flan e at each side of a greater len h than the istance between the centers of t e pivot pins.

FRANK OAKES. 

